Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 135 for “"Transmission systems"”.
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Modeling wireless acoustic power transmission systems
… of electromagnetic energy, acoustic wave transmission is often used for data communications and could be a viable option for wireless power transfer. Such a power transfer system design would need to incorporate the behavior of the entire acoustic channel, taking into account the …
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Voltage Security Optimization for Power Transmission Systems
… power planning to ensure voltage security in transmission networks. The problem is formulated as a voltage-secure multi-period optimal reactive power dispatch (MP-ORPD) problem. The optimization approach searches for optimal set-points of dynamic and static reactive power (var) resources. …
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Ultra-long haul optical fibre transmission systems
… experimentally options for optical fibre transmission over oceanic distances. Its format follows the chronological evolution of ultra-long haul optical systems, commencing with opto-electronic regenerators as repeaters, progressing to optically amplified NRZ systems and finally solitonic …
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Optical pulse storage rings and transmission systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Dispersion aspects of periodically amplified soliton transmission systems
This thesis presents improvements to optical transmission systems through the use of optical solitons as a digital transmission format, both theoretically and experimentally. An introduction to the main concepts and impairments of optical fibre on pulse transmission is included before introducing …
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WDM of solitons in dispersion managed transmission systems
… in wavelength division multiplexed (WDM) systems with dispersion management in a wide range of dispersion regimes. Background material is presented to show how solitons propagate in optical fibres, and key problems associated with real systems are outlined. Problems due to collision …
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Aspects of burst errors in digital telecommunications transmission systems.
… performance monitoring of digital communications systems. The objectives are to identify the structure of burst error activity and sense any subsequent changes in this structure. This research project investigates the use of the autocorrelation function of the error activity. Sources of error …
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Multi-Channel Nonlinear Frequency Division Multiplexed Optical Transmission Systems
Fiber-optic communication systems form the backbone of today's global digital infrastructure. Driven by the continuous growth of data traffic, these systems face major challenges in meeting the ever-increasing demand for higher data rates. This work focuses on long-haul systems that achieve high …
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An investigation of weaknesses in selsyn data transmission systems
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1941.
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Multilevel Nyquist-WDM Ultra-Long-Haul Coherent Optical Transmission Systems
… than intensity modulation direct detection systems, such solution enables to implement new multilevel transmission systems, allowing a more efficient use of the optical transmission bandwidth. These novel coherent optical communication systems have been made possible thanks to the …
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Optical switching and its application in Sonet-based transmission systems
… an optical time-division switch for Sonet based transmission systems is discussed.
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On the value of transmission systems under open access : incentives for investment
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Simplified approach for the reliability estimation of large transmission and sub-transmission systems
… analyse the expected performance of a utility’s transmission and sub-transmission network. The software requires a physical network model to be constructed, representing all network components. A high level of accuracy is obtained using such software, but significant effort is required to create …
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Long-term economically efficient transmission systems in a restructured and deregulated electric power industry
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1996.
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Control Applications and Economic Evaluations of Distributed Series Reactors in Unbalanced Electrical Transmission Systems
… need to analyse and determine the adequacy of transmission capacity. There is a need for approaches to increase transmission system capacity without construction of new transmission facilities, all while assuring secure operation of the grid. New technologies can enhance efficiency and …
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Effect of DERs on the Voltage Stability of Transmission Systems using a Voltage Stability Index
Interconnection of DERs into the transmission lines is starting to take a substantial share of the total power capacity. Although the largest share of power generation attributes to coal and gas power plants, renewable energy is gradually increasing. However, in the past, the size of DERs was …
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Control of an H-bridge modular multilevel converter for reliable operation of DC transmission systems
… be used to enhance the transient response of DC transmission systems. The schemes enable H-bridge MMC cell capacitor voltages to be regulated independent of the DC link voltage in a DC transmission system, and also permit operation with variable DC link voltage, down to zero voltage, with full …
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Numerically optimized implementations, mitigation and simulations of polarisation mode dispersion in real-time transmission systems
… effect are taken into account and simulations of transmission system with added PMD are presented. The basic outline of the work focusing on PMD can be divided as follows. At first the widely-used coarse-step method for simulating the PMD phenomenon as well as a method derived from the Manakov-PMD …
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Analysis and simulation of the Kerr effect in long haul in-line fiber amplifier transmission systems
… next generation of transoceanic submarine cable systems will use in-line fiber amplifiers to replace electrical regenerators. This new approach requires a better understanding of the fiber waveguide, especially the nonlinear characteristics. It has been demonstrated, both by numerical simulation …
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